In recent times, both Nigeria and the neighboring country, Ghana have experienced some seismological disturbances that have generated some concern among the citizens, researchers and stakeholders. One of the major concerns is how to investigate the cause(s) and possible means of transmission of these tremors. This is essential to understand the underlying nucleation mechanisms that might lead to seismicity and earthquakes in Nigeria, and to mitigate their effects on the environment. One of the prominent strike-slip faults that is implicated in the possible transfer of displacement into the continent is the Ifewara-Zungeru mega fault. A detailed structural investigation was conducted to highlight the linear and continuous segments, the interruption or break in magnetic anomaly and topographic patterns, areas of discontinuities, change in orientation and textural pattern, stream migration/shift and topographical breaks along this megastructure. Other associated structural features such as mega folds, faults, lineaments and Benue trough were also reviewed as possible channels of earthquake/earth tremor transmission. A new structural scheme was established by comparison of the above derivative results and geological data of some areas within the Nigerian Shield. The result of the study revealed the surface and subsurface 3D geometry, the kinematic indicators and the series of overprinting relationships/evolution of these structures and their capacity for earthquake transmission.

Keywords: Earthquakes: Strike-slip faults; Oceanic Fractures; magnetic signatures; Seismicity; Geological hazards